Messages in this thread | | | From | Jeff Moyer <> | Subject | Re: [patch/rft] jbd2: tag journal writes as metadata I/O | Date | Mon, 05 Apr 2010 16:34:36 -0400 |
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tytso@mit.edu writes:
> On Mon, Apr 05, 2010 at 02:36:07PM -0400, Jeff Moyer wrote: >> > >> > What benchmark were you using to test small file writes? This looks >> > good to me as well, but we might want to do some extra benchmarking >> > just to be sure we're not accidentally introducing a performance >> > regression. >> >> iozone showed regressions for write and re-write in runs that include >> fsync timings for small files (<8MB). Here's the command line used for >> testing: >> >> iozone -az -n 4k -g 2048m -y 1k -q 1m -e > > iozone is showing performance regressions or performance improvements? > I thought the point of this patch was to improve iozone benchmarks?
Sorry, Ted, what I meant to say was that iozone showed differences between deadline and cfq, where cfq's performance was much worse than deadline's.
Thanks! Jeff
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